If what I think happened actually happens, we are in for a pretty big feels trip. Here is my speculation:
My theory is that Yuu actually gets crushed by the rubble. However, right before, he uses his ability on someone else. Since his body is crushed, he is unable to return in 5 seconds and stays in the other person’s body. This would set up for the last few episodes where Yuu decides to return the body to the original owner after settling things with everyone else. I know there are lots of loopholes but this is just some idea that popped into my head.
